/* =========================================================
   Font
   ========================================================= */
@import url('https://db.onlinewebfonts.com/c/972f7552e487ad5d1f98d599f7f1e83c?family=Siemens+Sans');


/* =========================================================
   Base / Reset
   ========================================================= */
:root {
    --header-h: 70px;
    --rail: 1280px;
    --pad-x: 24px;
}

html {
    scroll-behavior: smooth;
}

* {
    box-sizing: border-box;
    font-family: "Siemens Sans", sans-serif !important;
}

html, body {
    width: 100%;

    overflow-x: hidden;
}

body {
    margin: 0;
    padding: 0;
    background: #020618;
    font-family: "Siemens Sans", sans-serif;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.row {
    margin-left: 0 !important;
    margin-right: 0 !important;
}

/* =========================================================
   Rail (1280 공통 정렬 단일 정의)
   ========================================================= */
.container-rail,
.intro-inner,
.track-inner,
.location-inner,
.cta-inner,
.info-inner,
.footer-links,
.keynote-inner,
.feature-wrap,
.agenda-inner {
    max-width: var(--rail) !important;
    margin-left: auto !important;
    margin-right: auto !important;
    padding-left: var(--pad-x) !important;
    padding-right: var(--pad-x) !important;
    width: 100% !important;
}

.container-rail {
    /*    outline: 1px solid red;*/
}

/* =========================================================
   Header (PC / Common)
   ========================================================= */
#siteHeader {
    background: transparent !important;
    /*    background: #000028 !important;
*/ box-shadow: none !important;
    backdrop-filter: none !important;
    transition: background .25s ease, box-shadow .25s ease, backdrop-filter .25s ease;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
}

    /* 스크롤하면 바로 배경 */
    #siteHeader.is-scrolled {
        background: #000028 !important;
        backdrop-filter: blur(10px) !important;
        box-shadow: 0 10px 30px rgba(0,0,0,0.25) !important;
    }

    #siteHeader .navbar {
        padding-left: 0 !important;
        padding-right: 0 !important;
    }

    #siteHeader .navbar-brand {
        padding-left: 0 !important;
        margin-left: 0 !important;
    }

    #siteHeader .navbar-nav {
        margin-left: 0 !important;
        padding-left: 0 !important;
    }

    /* header container도 rail 안으로 */
    #siteHeader .container-fluid {
        max-width: var(--rail) !important;
        margin: 0 auto !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
        width: 100% !important;
    }

/* PC nav layout */
.nav-desktop {
    width: 100%;
    margin: 0;
    padding: 15px 0;
    display: flex !important;
    align-items: center;
    gap: 28px;
    padding-left: 0 !important;
    padding-right: 0 !important;
}

    .nav-desktop > li {
        float: none !important;
    }

.nav-logo-link {
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center;
}

.nav-logo-img {
    height: 28px;
    width: auto;
    display: block;
}

.nav-item .nav-link {
    color: #ffffff !important;
    font-weight: 600;
    font-size: 1rem;
    padding: 0 !important;
    opacity: 0.9;
}

    .nav-item .nav-link:hover,
    .nav-item .nav-link:active,
    .nav-item .nav-link:focus {
        color: #00C1B6 !important;
        text-decoration: none;
    }

    .nav-item .nav-link:hover {
        opacity: 1;
        text-decoration: none;
    }

.nav-cta {
    margin-left: auto;
}

.nav-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    padding: 14px 26px !important;
    background: linear-gradient(90deg, rgb(0,215,160) 0%, rgb(0,190,220) 100%);
    color: black !important;
    font-weight: 700 !important;
    font-size: 16px;
    text-decoration: none !important;
    box-shadow: 0 10px 25px rgba(0,0,0,0.18);
    transition: background-color 0.3s ease, filter 0.3s ease;
    filter: brightness(1.05);
}

.navbar-nav > li > a.nav-btn:hover {
    background: linear-gradient(90deg, rgb(0,190,220) 0%, rgb(0,215,160) 100%);
    color: black !important;
    filter: brightness(1.05);
}

/* 햄버거 버튼 z-index (헤더 위에서 클릭되게) */
#menuToggle {
    position: relative;
    z-index: 60001 !important;
}


/* =========================================================
   Home / Banner
   ========================================================= */
.home-section {
    background-color: #020618;
    min-height: 100%;
/*    padding-top: var(--header-h);
*/    /*margin-top: calc(var(--header-h) * -1);*/
}

.video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 21 / 9;
    max-height: 480px;
    overflow: hidden;
    padding-top: 0 !important;
}

.hero-banner {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.hero-rail {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-start;
}

.hero-content {
    position: absolute;
    left: auto;
    top: auto;
    margin-top: 120px;
    max-width: 640px;
    z-index: 3;
    color: #fff;
}

.hero-title {
    margin: 0 0 14px 0;
    font-weight: 600;
    font-size: 3rem;
    line-height: 1.05;
    letter-spacing: -0.5px;
}

.hero-sub {
    margin: 0 0 18px 0;
    font-size: 1.75rem;
    font-weight: 600;
    color: #069999;
}

.hero-pill {
    display: inline-flex;
    align-items: center;
    padding: 0px;
    /*    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.25);*/
    /*    backdrop-filter: blur(6px);
*/ font-size: 1rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    align-items: center;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    text-decoration: none !important;
    font-weight: 500;
    font-size: 18px;
    border: 2px solid transparent;
    opacity: 0;
    transform: translateY(30px);
    animation: heroBtnUp 1.1s cubic-bezier(.22,1,.36,1) forwards;
    animation-delay: 0.4s;
}

    .hero-btn:hover {
        text-decoration: none;
    }

    .hero-btn.primary {
        background: linear-gradient(90deg, rgb(0,215,160) 0%, rgb(0,190,220) 100%);
        color: black !important;
        box-shadow: none;
        filter: brightness(1.05);
    }

        .hero-btn.primary:hover {
            background: linear-gradient(90deg, rgb(0,190,220) 0%, rgb(0,215,160) 100%);
            color: black;
            filter: brightness(1.05);
        }

    .hero-btn.outline {
        background-color: transparent;
        color: #00C1B6 !important;
        border: 1px solid #00C1B6;
        box-shadow: none;
        outline: none;
        transition: background-color 0.2s ease;
        animation-delay: 0.55s;
    }

        .hero-btn.outline:hover {
            background-color: #053033;
            border: 1px solid #00C1B6;
            filter: brightness(1.25);
        }

    /* 버튼 내부 화살표 */
    .hero-btn .arrow {
        font-size: 18px;
        line-height: 1;
    }

@keyframes heroBtnUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =========================================================
   Responsive (rail 고정)
   ========================================================= */
/* ⚠️ 기존 min-width 1280/1600에서 1320/1480로 커지는 충돌 제거: rail 고정 */
@media (min-width: 1280px) {
    .intro-inner,
    .info-inner,
    .location-inner,
    .cta-inner,
    .feature-wrap,
    .track-inner,
    .agenda-inner,
    .keynote-inner,
    .container-rail {
        max-width: var(--rail) !important;
    }
}

@media (min-width: 1600px) {
    .intro-inner,
    .info-inner,
    .location-inner,
    .cta-inner,
    .feature-wrap,
    .track-inner,
    .agenda-inner,
    .keynote-inner,
    .container-rail {
        max-width: var(--rail) !important;
    }
}

@media (max-width: 1200px) {
    .track-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .track-header h2 {
        font-size: 42px;
    }

    .track-header p {
        font-size: 18px;
    }
}

@media (max-width: 1100px) {
    .keynote-grid {
        grid-template-columns: repeat(2, minmax(0,1fr));
    }
}

@media (max-width: 1024px) {
    .sponsor-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .feature-wrap {
        grid-template-columns: repeat(2, minmax(0,1fr));
    }
}

@media (max-width: 991px) {
    .hero-content {
        left: 32px;
        max-width: 520px;
    }

    .hero-title {
        font-size: 38px;
    }
}

@media (max-width: 768px) {

    #siteHeader .logo img,
    #siteHeader .brand img,
    #siteHeader .navbar-brand img {
        width: 140px;
        max-width: 140px;
        height: auto;
    }

    #siteHeader .nav-desktop {
        display: none !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
        margin-left: 0 !important;
    }


    #siteHeader .navbar-brand {
        padding-left: 16px !important;
    }


    #menuToggle {
        display: block !important;
    }

    .hero-content {
        left: 22px;
        right: 18px;
        top: 40px;
        max-width: none;
        margin-top: 24px !important
    }

    .hero-title {
        font-size: 15px;
        line-height: 1.12;
    }

    .hero-sub {
        font-size: 16px;
    }

    .hero-pill {
        /*   font-size: 12px;
        padding: 7px 12px;
        width: 100%;
        max-width: 360px;
        min-height: 54px;
        border-radius: 999px;
        display: flex;
        align-items: center;
        justify-content: center;*/
        display: none;
    }

    .hero-btn {
        font-size: 15px;
        min-height: 52px;
    }

    .hero-actions {
        display: none;
    }
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
    background: #000028;
    padding: 20px 0;
    min-height: 80px;
    color: #90A1B9;
    border-top: 1px solid #3A3E4F;
}


.footer-rail {
    max-width: var(--rail);
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--pad-x);
}

.footer-links {
    display: flex;
    justify-content: flex-start;
    gap: 28px;
    flex-wrap: wrap;
}

    .footer-links a {
        color: #c9c9c9;
        font-size: 1rem;
        text-decoration: none;
        transition: color 0.2s ease;
    }

        .footer-links a:hover {
            color: rgb(0, 255, 185);
            text-decoration: none;
        }

/* =========================================================
   Hover / Focus reset (Bootstrap nav)
   ========================================================= */
.navbar-nav > li > a:hover,
.navbar-nav > li > a:focus,
.navbar-nav > li > a:active {
    background-color: transparent !important;
    color: #fff !important;
    text-decoration: none !important;
}

#mobileMenu a:hover,
#mobileMenu a:focus,
#mobileMenu a:active {
    background-color: transparent !important;
    color: #fff !important;
}

/* =========================================================
   Mobile Menu
   ========================================================= */
#mobileMenu {
    display: block !important;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .18s ease, visibility .18s ease;
    position: fixed;
    inset: 0;
    z-index: 50000 !important;
}

    #mobileMenu.open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    #mobileMenu .menu-dim {
        position: absolute;
        inset: 0;
        background: rgba(0,0,0,0.45);
        opacity: 0;
        transition: opacity .18s ease;
    }

    #mobileMenu.open .menu-dim {
        opacity: 1;
    }

    #mobileMenu .menu-panel {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 100%;
        width: 100vw !important;
        background: #000028;
        padding-top: 90px;
        transform: translateX(100%);
        transition: transform .22s ease;
        will-change: transform;
        display: flex;
        flex-direction: column;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        border-left: 0 !important;
    }

    #mobileMenu.open .menu-panel {
        transform: translateX(0);
    }

    /* mobile menu links (원본 그대로 유지) */
    #mobileMenu .menu-panel ul {
        padding: 0 24px;
        margin: 0;
        list-style: none;
    }

        #mobileMenu .menu-panel ul li a {
            display: block;
            padding: 14px 0;
            color: #fff;
            text-decoration: none;
        }

            #mobileMenu .menu-panel ul li a.menu-btn {
                margin-top: 12px;
                padding: 12px 0;
                background: #00FFB9;
                color: black;
                text-align: center;
                font-weight: 700;
                transition: all 0.3s ease;
            }

                #mobileMenu .menu-panel ul li a.menu-btn:hover {
                    opacity: 0.85;
                }

/* close btn */
#menuClose {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 28px;
    color: #fff;
    cursor: pointer;
    padding: 8px 12px;
    user-select: none;
}

/* list (원본 있던 스타일 유지) */
#mobileMenu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#mobileMenu li {
    margin: 0;
}

#mobileMenu a {
    display: block;
    padding: 16px 24px;
    color: #fff;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
}

    #mobileMenu a:hover {
        background: rgba(255,255,255,0.08);
    }